Measure Strain using an Analog Bridge Sensor

Discover Devices that Support Bridge Sensor Measurements

To discover a device that supports bridge sensor measurements, click the name of the device in the list in the Command window, or access the device in the array returned by daq.getDevices command. For this example use National Instruments® CompactDAQ Chassis NI cDAQ-9178 and module NI 9219 with ID cDAQ1Mod7.

Warning: The Rate property was reduced to 100 due to changes in the session
configuration.

Set Channel Properties

You must set the bridge mode according to the bridge circuit configuration and the nominal resistance to the specified value in the strain gauge data sheet. In this example, the strain gauges used are the SGD-3/350-LY13 linear strain gauges from Omega®.

Set Scans Rate

Set the ADCTimingMode to 'HighSpeed'.

Set the session to acquire 10 scans per second. By default, the ADC timing mode ADCTimingMode of the channel is set to 'HighResolution'. Dealing with high resolution acquisition requires longer processing time; module NI 9219 restricts the data acquisition rate to a maximum of 2. In order to increase the rate the ADCTimingMode is set to 'HighSpeed'